<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表单项标签</title>
</head>
<body>
<form action="#" method="post" autocomplete="off">
    用户名:<input type="text" name="username" value="" placeholder="请输入用户名" required><br/>
    密码:<input type="password" name="password"><br/>
    <button type="submit">提交</button>
    <button type="reset" >重置</button>
    <button type="button">按钮</button>
</form>
</body>
</html>